OpenSUSE Tumbleweed is rolling-release and we use all of the same (free software) QA and build systems we use for OpenSUSE Leap and SLE to build and test it. Not to mention that SUSE essentially mirrors packages between OpenSUSE Leap and SLE (our enterprise distribution).
I've been told by some of the people working on Tumbleweee that there's been a lot of people switching from Arch to OpenSUSE Tumbleweed because the packages are released much faster (which appears to be the case from my usage of Arch and TW). But if you're looking at having minimalist installs, there's still some work left to do (minimal "server" installs are still a bit too bloated, and --no-recommends isn't the default).
But yes, there is a rolling-release distribution backed by a company.